Hashemi Marjan, Akhoondi Leila, Saghi Mohammad Hossien, Eslami Akbar
Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Department of Environmental Health Engineering, Sabzevar University of Medical Sciences, Sabzevar, Iran.
Radiat Prot Dosimetry. 2019 Aug 1;184(2):148-154. doi: 10.1093/rpd/ncy193.
Natural radiation is a feature of the environment in which we live. One of the contributions of human exposure to ionizing radiation due to natural sources arises from gamma radiation. Therefore, present study was aimed to evaluate and map indoor gamma dose rate in Tehran. The corresponding annual effective dose (AED) and excess lifetime cancer risk (ELCR) were also calculated. All measurements were performed by a Geiger Muller detector in 43 dwellings in Tehran. The average indoor gamma dose rate in Tehran was appointed as 343.2 nGy/h. AED and ELCR were calculated as 2.4 mSv and 10.3 × 10-3, respectively. The evaluated indoor gamma dose rate and calculated AEDs and lifetime cancer risk were found higher than the world average value.
天然辐射是我们生活环境的一个特征。人类因天然源暴露于电离辐射的其中一个来源是伽马辐射。因此，本研究旨在评估并绘制德黑兰室内伽马剂量率图。还计算了相应的年有效剂量（AED）和终生超额癌症风险（ELCR）。所有测量均使用盖革-米勒探测器在德黑兰的43处住宅中进行。德黑兰室内伽马剂量率的平均值被确定为343.2纳戈瑞/小时。AED和ELCR分别计算为2.4毫希沃特和10.3×10⁻³。评估得出的室内伽马剂量率以及计算得出的AED和终生癌症风险高于世界平均值。
